summaryrefslogtreecommitdiff
path: root/dhall/src/errors/MissingField.txt
diff options
context:
space:
mode:
Diffstat (limited to 'dhall/src/errors/MissingField.txt')
-rw-r--r--dhall/src/errors/MissingField.txt30
1 files changed, 30 insertions, 0 deletions
diff --git a/dhall/src/errors/MissingField.txt b/dhall/src/errors/MissingField.txt
new file mode 100644
index 0000000..de14a33
--- /dev/null
+++ b/dhall/src/errors/MissingField.txt
@@ -0,0 +1,30 @@
+Explanation: You can only access fields on records, like this:
+
+
+ ┌─────────────────────────────────┐
+ │ { foo = True, bar = "ABC" }.foo │ This is valid ...
+ └─────────────────────────────────┘
+
+
+ ┌───────────────────────────────────────────┐
+ │ λ(r : { foo : Bool, bar : Text }) → r.foo │ ... and so is this
+ └───────────────────────────────────────────┘
+
+
+... but you can only access fields if they are present
+
+For example, the following expression is $_NOT valid:
+
+ ┌─────────────────────────────────┐
+ │ { foo = True, bar = "ABC" }.qux │
+ └─────────────────────────────────┘
+ ⇧
+ Invalid: the record has no ❰qux❱ field
+
+You tried to access a field named:
+
+↳ $txt0
+
+... but the field is missing because the record only defines the following fields:
+
+↳ $txt1